Log-barking machine having a gimbal mounting for toothed log-feeding wheels



Feb. 16, 1954 o. BOUCHARD 2,669,265

Los-BANKING MACHINE HAVING A GINBAL MOUNTING FOR TOOTHED LOG-FEEDING WHEELS #Vago/#geg Feb. 16, 1954 v Q BOUCHARD 2,669,266

LOG-BARKING MACHINE HAVING A GIMBAL MOUNTING FOR TOOTHED LOG-FEEDING WHEELS Filed June '7, 1951 4 Sheets-Sheet 2 R N K Feb. 16, 1954 Q BOUCHARD 2,669,266

LOG-BARKING MACHINE HAVING A GIMBAL. MOUNTING FOR TOOTHED LOG-FEEDING WHEELS' Filed June '7, 1951 14 Sheets-Sheet 3 a 3/ 750.9 I l /9 u t k.-

cl I

l /7 @l n. `Ilma-.m W 51 w15 @UCM/d Feb. 16, 1954 O. BOUCHARD LOG-BARKING MACHINE HAVING A GIMBAL. MOUNTING FOR TOOTHED LOG-FEEDING WHEELS Filed June 7, 1951 4 Sheets-Sheet 4 Patented Feb. 16,v 1954 LOG-EARRING MACHINE HAVING MOUNTING FOR TOOTH-ED LOG-FEEDING WHEELS Orezul Bouchard, Montreal,v Quebec, Ganada Application June 7, 1951, serial No. '230,290

(Cl. 14k-208) 4 Claims.-

The present invention pertains to a novel log barking machine for stripping bark from logs. My United States Patent No. 2,498,786 of February 28, 1950, discloses a machine of this general character, and the present invention resides in improvement and refinements of that machine.

The log is laid and fed transversely of the machine. It is propelled through thev machine by means of a rotatable toothed ring which rotates on an axis non-perpendicular to that of the log and thereby has a screw action on the log. One of the objects of this invention isto provi-de a means for adjusting the plane of the ring in order to adjust correspondingly the rate of speed of the log through the machine.

For this purpose the supporting shaft forthe toothed ring is carried by an auxiliary frame pivotally mounted on the main frame and movable toward the log. The ring is mounted on its shaft by means of two diametrical journal mountings perpendicular" to each other, and the ring is turned on either one of these mountings.

A log-holding device is pivotally attached to the Vmain frame for holding the log against a stripping knife. In this connection, another' obi ject of thev invention is to providev a mechanism that simultaneously brings the toothed wheel and the holding meansagainst the log.

As the log passes through the' machine, its advanced end should be gradually raised in' order to hold the unstripped part properly againstl the knife and the toothed feed wheel, since the stripped part is obviously of a smaller diameter. Another object of the invention is to provide a device for raising the advanced end ofthe log in the required manner. At the entrance side of the machine, the log rests on a roller, and at the outlet side the advance end of the log rides upward on a ramp provided at thislocat'ion.

The invention is fully disclosed by wayv of example in' the following description and in the accompanying' drawings in which:

Figure 1 isv a front elevation of the machine;

Figure 2` a plan view;

Figure an elevation of the right hand end of Figure `1;

Figure 4 is a detail vertical cross section ofv a gimbal mounting for the log advancing and rotating wheel, as taken on the line 4--4 of Figure 1; v

Figure 5 is a detail vertical cross section of Figure 4, as takenon line 5 5;

Figure 6 is a horizontal cross section of Figure 5, butf shows` elements of the' glm'bal Vmounting at different angular and phase relations;

Figure '7 is a partial longitudinal section, and

Figure 8 is a detail elevation of the cutter.

Reference to these views will now be made by 'use of like characters which are employed to designate corresponding parts throughout.

In Figures 1, 2 and 3 the framework of the machineis designated by the numeral l. At one end of the machine is mounted a motor 2 having a shaft 3 with a pulley 4 thereon. The frame l supports a transverse shaft 5 parallel to theshaft 3 andl carrying a pulley 6 driven from the pulley 4 by belts l.

In the lower corner of the forward end of the frame is journalled another cross shaft 8 (Figure 7) carrying a sprocket wheel 9 connected to a similar wheel I0 on the shaft 5 by a chain ll. Over the shaft 8 is a parallel shaft l2, supported as described below and carrying a sprocket wheel I3 joined to a wheel 9 by a chain I4. On the shaft l2 is a screw l5 for movingthe inserted log lengthwise. On the shaft 8 is pivotally mounted a pair of upwardly extending arms I6 carrying at their upper' ends a transverse bar I6.

On each end of the bar I 6" is mounted a sleeve Ily which guides a'spring-press'ed T-shaped bar I'l that engages a log that lies against the screw I5, as will presently be shown.

pposite the shaft l2 is parallel shaft I8 carrying a set of blades I9 for stripping the bark and a shorter set of blades 2li (Fig. 8) for cutting the knots. The shaft I8 is driven from the shaft 5 by a suitable chain or belt 2l.

Still anotl'ier'V shaft 22 lies below the shaft 5 In the upper part Of the frame I is mounted another transverse shaft 3i! which supports a pivcted auxiliary frame section 3l. The latter is adjusted from a hydraulic cylinder 32 which has a piston' rod 33'v pivotally attached to the frame section 3|'. An arm or link 34 extends from each rear corner of the frame section to a bellycrank lever 35 pivotally mounted :at 36- on each side ofthe mainframe. The arm or linkl 34 is pivotally attached to both members 3| and 35. The membersY 33 are joined by links 31 to Webs 38 on the members I6, as shown in Figure '7. Lugs 38' on the webs 38 support the shaft |2. The described mechanism closes the parts I6 and 3| upon a log inserted in the machine, as better shown in Figure l.

A transverse shaft 39 is mounted over the shaft and is driven therefrom by a belt and pulley connection 48. The shaft 30 carries opposed clutch elements 4| and 4| (center of Fig. 2) fitted with sprockets 42 and 43 of different sizes. These are chained at 44 and 45 to sprockets 46 on the shaft 39. The clutch elements 4| and 4| are loose on the shaft 3U, and between them is a connecting member 41 slidably keyed on the shaft. By means of a shifter 48, the member A shaft 18 (Figure 1) journalled longitudinally in the machine is rotated by a 'control lever 19 (Figure 2). The shaft 18 is linked at 8U to a four-way valve 8| which controls the fluid in the cylinder 32. As previously7 set forth, this cylinder is employed to elevate the frame 3| and at the same time to actuate the members I6 and |1 through the linkage 34-31. j

A tensioning arm 82 is applied to the belt 26 (Figure 1). The drive on the belt 1 from the motor pulley 4 is controlled by a clutch 83 adcooperates with Vthe screw I5 in moving the log 41 may be engaged with either of the' members At the forward end of the frame section3|l are bearings 49 (Fig. 4)'in which is journalled a shaft 5D. This shaft carries a toothed wheel 5| which engages and drives and rotates a log 52 inserted in the machine, as shown in Figure l. The wheel is driven by a chain 52 and sprocket Wheels 53 and 54 respectively on the shafts 36 and 50. The selected speed of the shaft 30 is applied proportionately to the work-rotating wheel 5|.

The toothed member 5| is in fact a ring mounted over an intermediate ring 55 which in turn is mounted on a hub 56 on the shaft 56 as shown in Figure 4. The toothed ring 5| is pivotally mounted diametrically of the ring 55 by a pair of opposed pins 51 as shown in Figure 5. The ring 55 consists of a pair of coinciding sections fastened together by rivets 58. The ring 55 is pivotally mounted on the secured hub 56 by 0pposed pins 59 on a diameter perpendicular to the rst named diameter.

The upper half of the wheel assembly is enclosed in a semi-cylindrical housing 6U. An arm 6| is welded upon the housing, and over this is a plate 62 constituting a portion of the frame section 3|. A bolt 63 pivotally joins the housing 60 to the plate 52 by passing through the arm 6| and is tightened by nuts 64.

An arm 65 is pivoted at 66 to the arm 6| and carries a rack 61 at its free end. The rack is joined to the main frame by a rod 68. On the arm 6| is mounted a bell crank lever 69 carrying a pin 1D (Figure 4) which acts as a pawl on the rack 61. Adjustment of the pin in the pawl changes the plane or slope of the toothed ring 5| so that it has an adjustable spiral action on the log and feeds it lengthwise at selected speeds.

The connection from the rack 61 to the rod 68 is in the nature of a universal joint shown in Figure 4. A nger 1| extends downward from the rack and has a pivotal mounting on another finger 12 which in turn is pivotally attached at 13 on a perpendicular axis to the member 68. Such a connection is necessary to maintain proper support of the rack 61 and pawl 69 in view of the tilting movement of the auxiliary frame 2|.

The log 52 is inserted from the right hand side of the machine in Figure 3 and is laid on a roller at the side. At the opposite side is mounted a ramp 16 with a fixed tube 11`at its higher end. After the log has progressed a distance through the machine, its forward and debarked end commences to ride up on the ramp.

16. Due to the smaller diameter of the debarked portion, this lifting of the forward end of the log maintains the unstripped portion in proper contact with the blades I9 and 20.

through the machine. The lengthwise speed of the log may be varied by changing the skew of the ring 5| 'by rocking its housing 60 in the manner already described. The ring 5| is lifted entirely from the log by operation of the cylinder 32 and otherwise rests by gravity on the log.

Although a specific embodiment of the invention has been illustrated and described, it will be understood that various alterations in the details of construction may be made without departing from the scope of the invention as indicated by the appended claims.

What I claim is:

1. A log barking machine comprising a frame, a knife rotatably supported thereby, an auxiliary frame pivotally supported by the first frame, a rotatable shaft in said auxiliary frame, a toothed ring on said shaft, a mounting for said ring on said shaft, said mounting being diametrical to said shaft and ring and said ring being rotatable on said mounting, means for adjustably setting said ring on said mounting, a holding bar pivotally attached to the first frame and movable toward said knife, means for swinging said auxiliary frame downward toward said knife, and means connected to the last named means for swinging said holding 4bar toward said knife.

2. A log barking machine comprising a frame, a knife rotatably supported thereby, an auxiliary frame pivotally supported by the first frame, a rotatable shaft in said auxiliary frame, a ring on said shaft, a diametrical rotary connection between said ring and shaft, a toothed ring on the rst ring, a rotary diametrical connection between said rings and perpendicular to the rst connection, and means for adjustably setting said toothed ring on said connections, a holding bar pivotally attached to the first frame and movable toward said knife, means for swinging said auxiliary frame downward toward said knife, and means connected to the last named means for swinging said holding bar toward said knife.

3. A log barking machine comprising a frame, a knife rotatably supported thereby, an auxiliary frame pivotally supported by the rst frame, a rotatable shaft in said auxiliary frame, a toothed ring on said shaft, said knife and shaft lying on 'parallel axes, means for moving said shaft` toward said knives, log-holding means opposite and spaced from said knife, a log support at one end of said space and transverse thereof, an upwardly and outwardly inclined ramp atthe other end of said space to lift the advancing end of a log moving through the machine, a screw rotatably mounted on said holding means so as to engage a log in the machine, and means for rotating said screw.

4. A log barking machine comprising a frame, a knife rotatably supported thereby, an auxiliary frame Vpivotally supported by the rst frame, a rotatableshaft insaid auxiliary frame, a toothed ring on said shaft, a mounting for said ring on said shaft, said mounting being diametrical to said shaft and ring and said ring being rotatable on said mounting, a housing over the upper part of said toothed ring and pivotally attached to said auxiliary frame, means for adjustably pivoting said housing to set said ring on said mounting, a holding bar pivotally attached to the rst frame and movable toward said knife, means for swinging said auxiliary frame downward toward said knife, and means connected to the last named means for swinging said holding bar toward said knife.

OREZUL BOUCHARD.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date Bezner Feb. 22, 1916 Burkholder May 28, 1918 Hellstrom Mar. 29, 1921 Smith June 10, 1930 Bezner Jan. 1, 1935 Power Dec. 4, 1945 Bouchard Feb. 28, 1950 FOREIGN PATENTS Country Date Great Britain May 28, 1895 Norway Aug. 17, 1914 

